Classifier



Dec. 13, 1938f D. M. WRIGHT 2,14051'80- CLASSIFIER Fi1ed March 15, 1937 2 sheets-sheet 1 flNvENToR A c` Wm ATTORNEY D. M. WRIGHT bec. 13, 1938.

CLASSIFIER Filed March l5, 1957 2 Sheets-Sheet 2 NY 0N Patented Dec. 13,7' 1938 A UNITED STATES PATENT OFFICE massima David M. Wright, Agricola, Fla., assigner, by

mesne assignments, to Swift and Company, Chicago, Iil., a corporation of Illinois Application March 15, 1937, Serial No. 131,029

3 Claims. (Cl. 209-462) This invention relates to ore conveyors and of levers I5 and as at 34 to plates I3. Pivots 34 classifiers. may be provided by extensions of the pins I4.

One of the objects of the invention is to pro- Links I9 are pivoted as at 35 to arms 36 ofvide a classifying rake having a relatively long levers I5 and as at 31 to arms 38 of levers I6, 5 flat operating zone. and thus serve to operatively connect levers I5 l Another object of the invention is to provide With levers I8. an improved link arrangement for operating a Links 20 are pivoted as at 39 to arms 40 of classifying rake. levers I6 and as at 4I to plates 42. Plates 42 Other objects of the invention will be apparent are bolted or otherwise secured to framework 5 10 from the description and claims which follow. of rake 2. 10

Reference is had to the drawings in which When crank l is in the position shown in similar characters of reference are used to des- Figuxe 2, it is seen that through links I2, rake 2 gnate like elements. is at the extreme of its rearwardmost lateral Figure l is a perspective view of a classifying movement. Byfrotatlng crank 'l in a counterrake constructed in accordance with the present clockwise direction, as viewed in Figure 2, it is ll invention. seen that rake 2 is laterally moved forwardly Figure 2 is a side view of the rake and linkage and that links I2 are inclined upwardly from mechanism. pivots 34 and thus through links I'l serve to Figure 3 is a top plan view of Figure 2. v raise arms 30 of levers I5. When arms 30 of The cross pieces I of rakeZ operate on inclined levers I5 are raised, arms 33 are lowered and N bed 3 of trough 4. Cross pieces I may comprise thus through link I8 rake 2 is lowered relative to individual angle irons rigidly ailixed to frame 5 bed l. It is further seen that through links I 9 of rake 2. arms 33 and 35 of levers I5 and arms 40 and 38 The mechanism for dragging the rake upwardly of levers I6 are respectively maintained in relaon the bed, lifting it and returning it to repeat tive movements and that through links 20 levers 3 the cycle is operated by shaft 6 through crank 'I I6 serve to raise and lower the opposite end and crank pin 8. Shaft 6 is journaled in suitable of rake 2 in a relative movement with links I8. bearings 9 bolted or otherwise secured to risers It is also seen that by continuing rotation of I0 and is rotatably driven by drive wheel or gear crank 1, rake 2 will be laterally moved in a II connected with a source of power not shown. rearwardly direction and that links I2 will be 30 Lateral motion of rake 2 is accomplished inclined downwardly from pivots 34 and thus through pitmen or links I2 pivoted as at one of through the several links I1, I8, I8 and 20 and their ends to crank pin 8 and at the other of levers I5 and I6 rake 2 will be raised relative their ends to plates I3 as by pins I4. Plates I3 to bed 3.

are bolted or otherwise rigidly secured to oppo` The solids material separated by rake 2 is in- 35 site frame members 5 of rake 2. termittently dragged upwardly along bed 3 in a At the extreme of its forwarddischarge movestep-by-step movement and on reaching end 43 ment, rake 2 is raised relative to bed 3 and thus of bed 3 is discharged into hopper 44 whence it returned to the extreme of its rearward move- IS passed through Opening 45 0n t0 endless COD- ment, whence it is lowered relative to bed 3 to veyor 46 or other conveying means for ,transfer 40 repeat the cycle. The raising and lowering of to a remote point.

rake 2 relative to bed 3 is accomplished through The present invention provides a most `simple crank levers I5 and I6 operatively connected arrangement for imparting reversible lateral with one another and with rake 2 and links I2 movements tothe rake 2 and for raising and lowas by links I'I, I8, I9 and 20. ering the rake at the extremes of its opposite 45 Crank levers I5 are fulcrumed as at2I to shaft mOVementS. 22, mounted in keepers 23. Crank levers I6 are I claim: fulcrumed as at 24 to shaft 25 mounted in keep- 1 In a rake classifier including 9, trough and erS 25- Keepers 23 and 25 are lesDeCtil/ely Sea rake movably mounted in said trough, means Cured t0 risers 27 and 23 Which serve t0 rigidly for reciprocating and for raising and lowering 50 SUppOTt TOUgh 4. the rake relative to said trough comprising a bell Links I I are pivoted as at 29 to arms 30 oi crank pivotally mounted at one end of the trough, levers I5 and as at 3| to links I2, the pivOtal a T-crank pivotally mounted at its intersec- DOD'CS 3| being intermediate plates I3 and Crank tion at the opposite end of the trough, a link con- Pins 3- Links I8 are DiVOed es at 32 t0 arms 33 necting corresponding arms of the bellwcrank and 55 the T-crank, links separately connecting the remaining corresponding arms of the bell crank and the T-crank with the rake, a crank shaft, a pitman connecting the crank shaft with the rake at the point of connection of the link connecting the T-crank with the rake and a link parallel to the last-mentioned link connecting the remaining arm of the T-crank with the pitman.

2. In a rake classifier including a trough, a rake movably mounted in the trough and means for reciprocating the rake relative to the trough comprising a crank shaft and a pitman connecting the crank shaft with the rake, means for raising and lowering the rake relative to the trough and in synchronism with the reciprocating movement of the rake comprising a bell crank pivotally mounted at one end of the trough, a T-crank pivotally mounted at its intersection at the opposite end of the trough. a link operatively connecting corresponding arms of the bell crank and the T-crank, a link connecting each of the other corresponding arms oi' the bell crank and the T- crank with the rake, the link connecting the T- crank with the rake connecting the rake at the point of connection of the pitman with the rake and a link parallel with the last-mentioned link connecting the remaining arm of the T-crank with the pitman.

3. In a rake classier including a trough and a rake movably mounted in said trough, means for reciprocating and for raising and lowering the rake relative to said trough comprising a bell crank pivotally mounted at one end of the trough, a T-crank pivotally mounted at its intersection at the other end of the trough, the vertical arm of the T-crank being linked to the vertical arm of the bell crank, a link connecting the other arm of the bell crank with the rake, a parallel link connecting the corresponding arm of the T-crank with the rake, a crank shaft, a pitman connecting the crank shaft with the rake at the point of connection of the last-mentioned link with the rake and a link parallel to the last-mentioned link connecting the remaining arm of the T-crank with the pitman.

DAVID M. WRIGHT. 

